Description

Trisodium 4-Hydroxy-3-[[4'-[[1-Hydroxy-6-(Phenylamino)-3-Sulphonato-2-Naphthyl]Azo]-3,3'-Dimethoxy[1,1'-Biphenyl]-4-Yl]Azo]Naphthalene-1,5-Disulphonate is a high-purity, water-soluble azo dye intermediate of significant industrial importance. Its complex polyazo structure, featuring multiple sulphonate groups, provides excellent solubility and strong chromophoric properties, making it a critical precursor for synthesizing high-performance dyes and pigments. This compound is essential for manufacturers in the textile, ink, and specialty coatings industries seeking to produce vivid, stable colors.

Application

• Primary Intermediate for Reactive Dyes: Key building block for manufacturing high-quality reactive dyes used in cotton and cellulose fiber dyeing.
• Textile Colorant Synthesis: Used in the production of direct and acid dyes for wool, silk, and nylon, offering good light and wash fastness.
• Inkjet Ink Pigments: Serves as a precursor for advanced pigment preparations used in industrial and commercial inkjet printing.
• Specialty Coatings and Paints: Employed in the synthesis of organic pigments for automotive, industrial, and decorative coatings.
• Paper Coloring: Used in the manufacture of dyes for high-grade paper and packaging materials.
• Biological Staining Reagent: Potential use as an intermediate for histological stains and indicators in laboratory settings.
• Functional Material Research: Investigated as a component in the development of dye-sensitized solar cells (DSSCs) and other optoelectronic devices.

Basic Information

Product Name	Trisodium 4-Hydroxy-3-[[4'-[[1-Hydroxy-6-(Phenylamino)-3-Sulphonato-2-Naphthyl]Azo]-3,3'-Dimethoxy[1,1'-Biphenyl]-4-Yl]Azo]Naphthalene-1,5-Disulphonate
CAS No.	94944-81-7
Molecular Formula	C46H30N6Na3O16S4
Molecular Weight	~1128.0 g/mol (Contact for exact details)
Synonyms	Trisodium 4-hydroxy-3-{[4'-({1-hydroxy-6-[(phenyl)amino]-3-sulfonato-2-naphthyl}azo)-3,3'-dimethoxy[1,1'-biphenyl]-4-yl]azo}naphthalene-1,5-disulfonate; C.I. Direct Brown 223; Direct Brown 223; Direct Brown 223, trisodium salt; 1,5-Naphthalenedisulfonic acid, 4-hydroxy-3-((4'-((1-hydroxy-6-(phenylamino)-3-sulfo-2-naphthalenyl)azo)-3,3'-dimethoxy(1,1'-biphenyl)-4-yl)azo)-, trisodium salt; Trisodium 4-hydroxy-3-((4'-((1-hydroxy-6-(phenylamino)-3-sulfonato-2-naphthyl)azo)-3,3'-dimethoxy(1,1'-biphenyl)-4-yl)azo)naphthalene-1,5-disulfonate; Azo Dye Intermediate Brown 223.
EINECS	Contact for details

Quality Control

Our production of this advanced dye intermediate adheres to strict quality management systems. Each batch is analyzed to ensure consistent chemical identity, purity, and performance characteristics. We provide comprehensive Certificates of Analysis (COA) detailing key parameters such as assay, impurity profile, and solubility. Quality is verified through modern analytical techniques including HPLC, UV-Vis spectroscopy, and titration methods to meet the exacting standards of the dye and pigment manufacturing industry.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at a controlled room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept sealed to prevent absorption of atmospheric moisture. Keep away from incompatible materials such as strong oxidizing agents.

Specification

Item	Specification
Appearance	Dark brown to black powder or solid
Identification (IR)	Conforms to structure
Assay (HPLC)	Min. 95%
Solubility (in Water)	Freely soluble
Moisture Content (KF)	Max. 5.0%
Sulfated Ash	Contact for details
Heavy Metals (as Pb)	Max. 20 ppm

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.